Chuck.



H. J. KIMMAN.

CHUCK. APPLICATION PIL-ED BEPT.12, 1904.

993,382, Patented May 30, 1911.

di@ AHORA/Ens HENRY J'. KIMMAN, 0F CLEVELAND, OHIO, ASSIGNOR TO CHICAGO PNEUMATIC TOOL COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION 0F NEW JERSEY.

' CHUCK.

Specication of Letters Patent.

Patented May 30, 1911.

Application filed September 12, 1904. Serial No. 224,120.

To all whom it may concern:

Be it known that I, HENRY J. KIMMAN, a citizen of the United States, residing at the city of Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Chucks, of which the following is a specification. A

My invention relates to chucks or the like adapted and designed for the purpose of holding the working tools, such as drills, and the object of my invention is to produce a novel and eiiicient chuck adapted to hold or clamp that form of drill which is substantially a iat bar rectangular in cross section.

The feature of advantage and utility of my improved chuck will be apparent from the description hereinafter given.

In the drawing, Figure 1 is a central longitudinal section of my improved chuck; Fig. Q a similar section taken at right angles to that of Fig. 1; and Figs. 3 and 4 sections I on lines 3 and 4 respectively of Fig. 2.

As shown in the drawing, the chuck comprises a substantially cylindrical tool holder 1 which is provided with or attached to a shank 2 which is inserted in the socket of the operating machine or tool, such as, for instance, a pneumatic drilling machine as now well known and in common use.

The tool holder 1 has a transverse slot 3 extending longitudinally thereof for the greater portion of its length. This slot which is rectangular in cross section is of a size to receive the body of the flat bar shaped tool 4, as clearly indicated in the drawlng. The lower or outer end of this tool holder has a conical base 5 at its apex, extending into the slot 3.

Within the conical recess or bore of the tool holder are arranged two similar clamping members or clamps 6, which are substantially halvesy of a truncated cone. The drill passes between the clamps and is clamped thereby by forcing them upwardly or inwardly in the conical bore of the tool holder. To thus clamp the tool I- employ, in the present instance, a clamping collar or cap 7 internally screw-threaded and adapted to screwed upon the tool holder, is designed to force the clamps 6 inwardly to clamp the tool in the manner already explained. Instead of having the collar 7 bear directly against the clamps I prefer to interpose between suchv clamps and an inturned iange 8 of the collar, a ring 9 with the result that the frictional contact is had between the ring and the collar,'thereby reducing the resistance to the rotation of the collar and obtaining a tighter clamping of the tool.

The tool holder is substantially cylindrical as stated but is provided toward its outer end with a flange 10 and at its other end with another flange which, as shown, .is formed by a ring 11 screwing onto the reduced upper end of the tool holder. p

Between the flanges l0 and 11 of the tool holder is arranged a sleeve l2 adapted to rotate and thereby adjust an abutment for the purpose of limiting the degree of insertion of the tool or drill and for forcing such drill outwardly when desired or after the same becomes shortened after continued use and sharpening. To this end the sleeve is internally screw-threaded in order to cooperate with an abutment or block 13 litting in the slot 3 and movable freely therein. This block extends transversely of the slot and entirely thereacross with its ends provided wth screw threads engaging the screw threads on the interior of the sleeve 12, with the result that rotation of the sleeve moves the block longitudinally according to the direction of rotation.

From the foregoing descriptlon .it will be observed that in inserting the drill the block 13 forms an adjustable stop against which the inner end of the drill strikes. After the drill is inserted, the same may be given the desired amount of projection beyond the end ofthe chuck by adjusting the block 13 in or out. When the drill is new and of the full length, the block 13 is at the innermost position or adjustment, as indicated .in full lines in Fig. 1, and as in use the drill becomes shorter the block together withthe drill is adjusted or moved outwardly by rotation of the handle in order that the drill may project the desired distance, as indicated in dotted lines in Fig. 1. yWhen this desired projection is obtained, the collar 7 is screwed up tight with -the result that the clamps 6 tightly clamp the drill or tool.

Iv claim: c 13.

1.- A chuck comprising a tool consisting of a shank and tool holder proper, the latter having a longitudinal slot extending through opposite sides and substantially from end to end of such tool holder proper to receive a flat tool or drill and designed to coperate withthe same along its length and thereby hold the tool against rotation, and means cooperating With said tool holder for clamping the tool thereto. v

2. A chuck comprising a tool consisting of a shank and tool holder proper, the latter having a longitudinal slot extending through opposite sides and substantially from end to end of such tool holder proper to receive a fiat tool or drill and designed to coperate with the same along its length and thereby hold the tool against rotation, and means cooperating with said tool holder for clamping the tool thereto consisting ofy a pair of clamps arranged at the outer end of the slot 'and coperating with the tool holder proper to engage opposite sides of the tool intermediate its length.

3. A chuck comprising a tool holder having a longitudinal slot extending through oppositesides and substantially from end to end to receive a flat tool and designed to cooperate with the same along its length and thereby hold the tool against rotation, an

adjustable block movable longitudinally in'- said slot and adapted to coperate with the inner end of the tool when inserted, and

means coperating with the tool holder for clamping the tool thereto. v

4. A chuck comprising a tool consisting of a shank and tool holder proper, the latter having a longitudinal slot extending substantially from end to end of such tool holder proper to receive a flat tool or drill and designed to coperate with the same along its length and thereby hold the tool against rotation, said slot terminating at its outer end in a conical recess, a clamping device for engaging opposite sides of the tool comprising tWosubstantially truncated conical members fitting in said recess and positioned on opposite sides of the tool when inserted and means for forcing said members inwardly in said recess.

5. A chuck comprising a tool consisting of a shank and tool holder proper, the latter having a longitudina'lfjgslot extending substantially from end 'to end of such tool holder proper to receive a flat tool or drill and designed to coprate with the same along its length and thereby hold the tool against rotation, said slot terminating at its outer end ina conical recess, a clamping device for engaging opposite sides of the tool comprising two substantially truncated conical members itting in said recess and positioned on opposite sides of the tool when inserted, means for forcing said members in-r` wardly to clamp the tool, and an adjust-able block movable longitudinally in said slot and adapted to cooperate with the inner end of the tool when inserted.

6. A chuck comprising a tool holder having a longitudinal slot with two substantially parallel sides to receive a flat tool or drill and adapted to preventrotation thereof, an adjustable abutment movable in said slot and arranged to coperate with the inner end of the tool, a sleeve mounted toA of an inserted tool or drill, and a sleeve' mounted to rotate on Asaid tool holder and arranged to coperate with said block to adjust its position longitudinally, said tool holder having a flange against which the sleeve bears to prevent longitudinal movement with respect to the tool holder;

8. A chuck comprising a tool holder having a longitudinal slot to receive a fiat tool 'or drill, an adjustable block movable longitudinally in the slot of the tool holder and 'screw-threaded at its ends, and an interiorly screw-threaded sleeve engaging said block andA by its rotation arranged to move and adjust the latter in one direction or the other, and means adapted to restrain the sleeve from longitudinal movement.

9. A chuck comprising a tool holder having a longitudinal slot to receive a flat tool or drill, said tool holder having flanges 10 and 11 an adjustable block screw-threaded at its ends and movable longitudinally in the slot :of the tool holder, `and an interiorly screw-threaded sleeve surrounding the tool holder between said flanges and interiorly screw-threaded to engage the ends of the block ti''move and adjust the latter longitudinally of the 'tool holder?,

' 10. A chuck comprising af'tool holder havin a central longitudinal transverse slot of ob ong cross-section adapted to receive and prevent rotation of a flat tool or drill and having its outer end conically recessed or bored, clamping members itting into such recess and arranged to clamp the tool between them, means for actuating the clamping tudinal movement of the sleeve with respect members, a block slidable 1n said slot and to the tool holder when the former is roagainst which the inner end of the tool tated.

abuts, a sleeve mounted to rotate on the tool -HENRY J. KIMMAN. holder and operatively connected with the Witnesses:

block'or adjusting the latter longitudinally C. J. CAREW,

of the slot, and means for preventing longi- S. W. PRINCE. 

